Finger weeding tool for a soil cultivation device, method for mechanically fighting weeds in row plantings

ABSTRACT

A finger-hoe tool for a soil-tilling device, which has at least one finger, and a method for mechanical control of weeds in row crops make possible an input of loose materials into the row or a discharge of loose materials from the row, because the at least one finger has at least one device for collection and/or removal of the loose materials (e.g. earth, sand, stones), whereby not only the weakly rooted weeds but also more strongly rooted weeds can be controlled.

PRIOR ART

The invention relates to a finger-hoe tool for a soil-tilling device according to the class of claim 1, and to a method for mechanical control of weeds in row crops according to the class of claim 8.

Soil-tilling devices that are used simultaneously for mechanical soil tilling and especially for weed control within one or more crop rows have long belonged to the prior art. Thus Patent Specification EP 1 127 481 B1 teaches a finger hoe for weedkilling, with mechanical drive by soil drive elements, which is equipped with weeding fingers disposed to move in rotation via the soil drive elements. With this already known finger hoe, it is indeed also possible to shift the soil tilling from the space between two rows into the rows without harming the crops, but usually only weakly rooted weeds, which can be pulled out of the soil together with their roots, are controlled thereby.

Furthermore, German Patent Specification DE 196 07 602 C2 teaches a clearing device, provided with a clearing finger, for a sowing machine, U.S. Pat. No. 4,646,850 A teaches a soil-tilling device with soil-tilling tools disposed in star-shaped rotary manner, and U.S. Pat. No. 4,312,4090 A teaches a rotary agricultural hoe.

THE INVENTION AND ITS ADVANTAGES

By comparison, the finger-hoe tool according to the invention for a soil-tilling device, which is provided with at least one finger, with the features of claim 1, and the method according to the invention for mechanical control of weeds in row crops, with the features of claim 8, have the advantage that, since at least one finger is provided with at least one means for collection and/or removal of loose materials (e.g. earth, sand, stones), an input of loose materials into the row or a discharge of loose materials from the row is made possible, whereby not only the weakly rooted weeds but also more strongly rooted weeds can be controlled. Thus, with the finger-hoe tool according to the invention, it is also possible to utilize not only the main effect of uprooting the weeds but also two further effects, namely a heaping effect, which is caused by the input of loose materials into the row and supports the growth of the crops and/or buries strongly rooted weeds, and a plowing effect, which is caused by the discharge of loose materials from the row and by which, for example, earth input during earthing up is again conveyed out of the row after the death of the buried weeds. In the process, the shape of a star wheel (e.g. plastic disk) of a finger-hoe tool according to the invention influences its aggressiveness toward the soil surface, whereby all three effects of the finger-hoe tool according to the invention are influenced.

According to an advantageous configuration of the finger-hoe tool according to the invention, the at least one means for collection and/or removal of loose materials is a projection and/or the at least one means for collection and/or removal of loose materials is a hollow.

According to an additional advantageous configuration of the finger-hoe tool according to the invention, the at least one finger is provided with at least one finger end, on which the means for collection and/or removal of loose materials is disposed.

According to an additional advantageous configuration of the finger-hoe tool according to the invention, the finger-hoe tool is provided at least partly with a structured surface, so that a removal of loose materials is simplified in contrast to a smooth surface.

According to an additional advantageous configuration of the finger-hoe tool according to the invention, the finger-hoe tool is provided at least partly with a textured (e.g. honeycomb-like) surface.

According to an additional advantageous configuration of the finger-hoe tool according to the invention, at least one finger is axially and/or radially curved.

According to an additional advantageous configuration of the finger-hoe tool according to the invention, the finger-hoe tool is made at least partly of plastic. Preferably it is manufactured in the injection-molding process.

According to an advantageous configuration of the inventive method for mechanical control of weeds in row crops by means of a soil-tilling device provided with at least one finger-hoe tool, especially a finger hoe in which the finger-hoe tool is provided with at least one finger, which is provided with at least one means for collection and/or removal of loose materials, whereby an input of loose materials into the row or a discharge of loose materials from the row is made possible depending on device setting of the soil-tilling device (finger hoe), a finger-hoe tool according to one of claims 1 to 7 is used as the finger-hoe tool.

Further advantages and advantageous configurations of the invention can be inferred from the following description, the drawing and the claims.

DRAWING

Preferred exemplary embodiments of the subject matter according to the invention are illustrated in the drawing and will be explained in more detail in the following, wherein

FIG. 1 shows a side view of a finger-hoe tool belonging to the prior art,

FIG. 2 shows a perspective view of a star wheel belonging to the finger-hoe tool according to the invention,

FIG. 3 shows an overhead view of the star wheel according to FIG. 2,

FIG. 4 shows a side view of the star wheel according to FIG. 2,

FIG. 5 shows a sectional drawing of the star wheel according to the section line A-A from FIG. 3,

FIG. 6 shows a perspective view of a star wheel belonging to a finger-hoe tool according to the invention,

FIG. 7 shows an overhead view of the star wheel according to FIG. 6,

FIG. 8 shows a sectional drawing of the star wheel according to the section line A-A from FIG. 7,

FIG. 9 shows a perspective view of a finger-hoe tool according to the invention with axially curved fingers,

FIG. 10 shows a partial view of the finger-hoe tool according to the invention according to FIG. 9,

FIG. 11 shows a perspective view of a finger-hoe tool with radially curved fingers and

FIG. 12 shows another view of the finger-hoe tool according to the invention according to FIG. 11.

DESCRIPTION OF THE EXEMPLARY EMBODIMENT

FIG. 1 shows a side view of a finger-hoe tool belonging to the prior art, which can be disposed to rotate around an axis of rotation 1 on the soil-tilling device, not illustrated. By means of bolted connections 2, a cover plate 3 is joined to a star wheel 5 provided with several fingers 4 (weeding fingers). The drive of the finger-hoe tool is provided mechanically by means of soil drive elements 7 that penetrate into the soil and are disposed on a drive plate 6, which is connected to the star wheel 5.

FIG. 2 shows a perspective view of a star wheel 5 belonging to a finger-hoe tool according to the invention. The fingers 4 are provided with finger ends 8, on which means for collection and/or removal of loose materials are disposed in the form of projections 9. Preferably the projections 9, which do not necessarily have to be present on every finger 4, are disposed on the side of a star wheel 5 turned toward the soil. It is also conceivable for the projections 9 to be disposed on the upper side of a finger 4 or for projections 9 to be disposed on the underside and upper side of fingers 4 or alternatively or additionally laterally on the finger 4. The projections 9 are preferably provided with bowl-shaped indentations 10, which may be disposed on one side of the projection 9, whereby this becomes a scoop, or on both sides of projection 9, and by which a collection and/or removal of loose materials is facilitated.

FIG. 3 shows an overhead view of the star wheel 5 according to FIG. 2. Bores 11 permit a bolted connection of the star wheel 5 with a cover plate, not illustrated as well as with a drive plate, not illustrated.

FIG. 4 shows a side view of the star wheel 5 according to FIG. 2.

FIG. 5 shows a sectional drawing of the star wheel 5 according to the section line A-A from FIG. 3.

FIG. 6 shows a perspective view of a star wheel 5 belonging to a finger-hoe tool according to the invention, and FIG. 7 shows an overhead view of the star wheel 5 according to FIG. 6. These fingers 4 are provided with a textured surface, so that they consist not of solid material but instead are provided with means for collection and/or removal of loose materials in the form of hollows 12, which may be disposed on the upper side, on the underside and/or laterally on the star wheel 5. Hereby a savings of material is achieved, so that the star wheel 5 can be manufactured more cost-effectively.

FIG. 8 shows a sectional drawing of the star wheel according to section line A-A from FIG. 7. Preferably, the hollows 12, which may be configured to be equally thick or differently deep, are disposed in such a way that a middle web 13 remains between them. Preferably the middle web 13 is formed to be equally thick over the length of the finger 4, whereby the hollows 12 become progressively shallower in the direction of finger end 8. It is also conceivable for at least one part of the hollows 12, for example the hollows 12 disposed in the middle part of the star wheel 5, to be connected to one another, so that the middle web 13 is omitted and a continuous recess (opening) is formed, whereby even more material can be saved.

FIG. 9 shows a perspective view of a finger-hoe tool 14 according to the invention with axially curved fingers 4. Beginning at a kink point 15, these fingers 4 experience a bend toward the soil.

FIG. 10 shows a partial view of the finger-hoe tool 14 according to the invention according to FIG. 9.

FIG. 11 shows a perspective view of a finger-hoe tool 14 according to the invention with radially curved fingers 4.

FIG. 12 shows another view of the finger-hoe tool 14 according to the invention according to FIG. 11.

All features presented in the description, the following claims and the drawing can be essential to the invention both individually as well as in any combination whatsoever with one another.

LIST OF REFERENCE SYMBOLS

-   1 Axis of rotation -   2 Bolted connection -   3 Cover plate -   4 Finger -   5 Star wheel -   6 Drive plate -   7 Soil drive element -   8 Finger end -   9 Projection -   10 Indentation -   11 Bore -   12 Hollow -   13 Middle web -   14 Finger-hoe tool -   15 Kink point 

1-8. (canceled)
 9. A finger-hoe tool (14) for a soil-tilling device, especially a soil-tilling device for row crops, wherein the finger-hoe tool (14) is provided with an axis of rotation (1), with a star wheel (5), which is provided with several fingers (4) and which is provided with an upper side turned away from the soil and an underside turned toward the soil, and with a soil drive element (7) provided with an axis of rotation, wherein the axis of rotation (1) of the finger-hoe tool (14) corresponds to the axis of rotation of the soil drive element (7), the soil drive element (7) is connected interlockingly with the finger-hoe tool (14), at least one finger (4) is provided with at least one means for collection and/or removal of loose materials, wherein a means for collection and/or removal of loose materials is disposed on the upper side of the star wheel (5), the underside of the star wheel (5) or laterally relative to the star wheel (5) or several means for collection and/or removal of loose materials are disposed on the upper side of the star wheel (5), the underside of the star wheel (5) and/or laterally relative to the star wheel (5), and the at least one means for collection and/or removal of loose materials is a projection (9) and/or the at least one means for collection and/or removal of loose materials is a hollow (12).
 10. The finger-hoe tool (14) according to claim 9, wherein the at least one finger is provided with at least one finger end (8), on which the means for collection and/or removal of loose materials is disposed.
 11. The finger-hoe tool (14) according to claim 9, wherein the finger-hoe tool (14) is provided at least partly with a structured surface.
 12. The finger-hoe tool (14) according to claim 9, wherein the finger-hoe tool (14) is provided at least partly with a textured surface.
 13. The finger-hoe tool (14) according to claim 9, wherein at least one finger (4) is axially and/or radially curved.
 14. The finger-hoe tool (14) according to claim 9, wherein the finger-hoe tool (14) is at least partly of plastic.
 15. A method for mechanical control of weeds in row crops by means of a soil-tilling device, especially a finger hoe, provided with at least one finger-hoe tool (14) provided with an axis of rotation (1), wherein the finger-hoe tool (14) is provided with a star wheel (5), which can be driven by a soil drive element (7) provided with an axis of rotation and which is provided with several fingers (4), wherein the star wheel (5) is provided with an upper side turned away from the soil and an underside turned toward the soil, and wherein the axis of rotation (1) of the finger-hoe tool (14) corresponds to the axis of rotation of the soil drive element (7) and wherein at least one finger (4) is provided with at least one means for collection and/or removal of loose materials, whereby an input of loose materials into the row or a discharge of loose materials from the row is made possible depending on device setting of the soil-tilling device, wherein a means for collection and/or removal of loose materials is disposed on the upper side of the star wheel (5), the underside of the star wheel (5) or laterally relative to the star wheel (5) or several means for collection and/or removal of loose materials are disposed on the upper side of the star wheel (5), the underside of the star wheel (5) and/or laterally relative to the star wheel (5).
 16. The method according to claim 15, wherein the soil drive element (7) is connected interlockingly with the finger-hoe tool (14), and the at least one means for collection and/or removal of loose materials is a projection (9) and/or the at least one means for collection and/or removal of loose materials is a hollow (12). 